[cfe-commits] r58374 - /cfe/trunk/Driver/clang.cpp

[Daniel Dunbar]

Author: ddunbar
Date: Wed Oct 29 02:56:11 2008
New Revision: 58374

URL: http://llvm.org/viewvc/llvm-project?rev=58374&view=rev
Log:
Improve llvm-gcc compatibility, -Os implies -O2 (sortof).

Modified:
    cfe/trunk/Driver/clang.cpp

Modified: cfe/trunk/Driver/clang.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/Driver/clang.cpp?rev=58374&r1=58373&r2=58374&view=diff

==============================================================================
--- cfe/trunk/Driver/clang.cpp (original)
+++ cfe/trunk/Driver/clang.cpp Wed Oct 29 02:56:11 2008
@@ -1140,8 +1140,14 @@
          llvm::cl::init(0));
 
 static void InitializeCompileOptions(CompileOptions &Opts) {
-  Opts.OptimizationLevel = OptLevel;
   Opts.OptimizeSize = OptSize;
+  if (OptSize) {
+    // -Os implies -O2
+    // FIXME: Diagnose conflicting options.
+    Opts.OptimizationLevel = 2;
+  } else {
+    Opts.OptimizationLevel = OptLevel;
+  }
 
   // FIXME: There are llvm-gcc options to control these selectively.
   Opts.InlineFunctions = (Opts.OptimizationLevel > 1);